Electrical push-button



(No Model,)

J. GEARY.

ELECTRICAL PUSH BUTTON. I No. 320,238. Patented June 16, 1885.

W'xmesses: 1m: aumr:

JOHN GEARY, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRICAL PUSH-BUTTON.

SPECIFICATION forming part of Letters Patent No. 320,238, dated June 16,1885.

Application filed April 15, 18: 4. (No model.)

T 0 all whom it may concern:

Be it known that 1, JOHN GEARY, a citizen of the United States, residingat Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inElectrical Push-Buttons; and I do hereby declare the following to be afull, clear, and exact description of the invention, reference being hadto the accompanying drawings, which form part of this specification, inwhich- Figure 1 is a vertical or transverse section.

2 is an inverted plan. Fig. 3 is a perspective of staple.

My invention has for its object to provide an electrical puslrbutton,which in operation shall have rubbing or sliding contacts, whereby thepoints 01" Contact will be kept clean and insulation from dust, &c.,avoided.

A further object of my invention is to provide an electrical push-buttonwhich shall be simple in construction and comparatively inexpensive, yetdurable, el'licient, and not liable to get out of order.

My invention consists in the peculiar con struction and combinationsofparts hereinafter fully set forth and claimed.

Referring to the accompanying drawings, A represents an insulating-basein the form of a ring, and B a metal cylinder or cap attached thereto.Itdesired, parts A and B may be integral and consist of insulatingmaterial.

C is a button or disk designed and adapted to fit in the cylinder B andto be moved in and out in the latter. On the inner or under side of thisbutton or disk, and between the latter and the shoulder u of the ring A,is a spiral spring. D, which tends to press said button outwardly orupwardly, and which will yield to pressure and permit said button to bepushed inwardly or downwardly.

To the inner side of said button 0 is secured, by a screw, 0, orequivalent fastening, a metallic spring-staple, E, of approximately Ushape, having two limbs or branches, 6' e. The outer extremities ofthese limbs converge toward each other, as shown at c e, not meeting,however, whenthe button is in its normal outward position. Theseextremities are adapted and designed to establish metallic M connectionbetween the electrodes or battery terminals ff, which latter are shownas wires passing into the base A. Vhen the button 0 is pushed inwardly,the ends (2 c are brougl 11 into contact with said terminals ff, slidingand rubbing thereon in the act of forming con tact, thus operating tokeep the contacting surfaces clean and bright.

To keep the button and its attached parts from coming out of place, oneof the legs of the staple E is provided with a lug or stop, c, whichabuts against a transverse pin, y, inserted in the base, and to keep thebutton from being pushed in too far, another lug or stop, c. may beformed on one of the legs of the staple E, the pin 5 thus coming betweensaid twolugs or stops, which latter are plainly illustrated in Fig. 3.

It is obvious that when the button is pushed in, electrical connectionis established between the battcry-terminals through the staple E, andthat when pressure is relieved the button is impelled outwardly byspring I), elcctiical disconnection being thus el't'e(ted and the legsof the staple springing apart.

\Vhat I claim as my invention isas follows:

1. The combination, in an electrical pushbutton, 01 base A, cylinder orcap B, button 0, spring I), swing-staple E, having converging ends 0 c,and naked \\'iresf which pas through holes in said base and are pcrmanently secured therein, substantially as shown and described.

2. In an electrical push-button, the combination, with spring-staple E,having a lug, c or a of transverse pin y in base A, substautially asshown and described.

In testimony that I claim the foregoing l have hereunto set my hand this10th day ol' April, 1884.

JOHN GEARY.

\Vitnesses:

\VILL H. POWELL, ANDREW ZANE, Jr.

